Added a failing test case for error method, it just doesn't show the
custom error message when using:

```
error 404 do
  'my 404'
end
```

it does work when using `not_found`
Updates submodules
Updated Sinatra to 1.4.2
Update changes with release dates
Update submodules versions again
Fix check_app
Merge branch 'master' of github.com:padrino/padrino-framework

* 'master' of github.com:padrino/padrino-framework:
  Update submodules versions again
  Update changes with release dates
update favicon
Merge pull request #1170 from WaYdotNET/master

update favicon
Fixed the issue and made numeric-id-based-orms use integers, not strings which were making datamapper fail to first find the records and afterwards delete them!
Use the same format as the rest of the components file
Merge pull request #1171 from padrino/fix-delete-many-ids-parsing

Fixed "Still, 303 for destroy_many on admin"
Merge pull request #1149 from padrino/failing-test-case-for-error-method

Failing test case for error method.
Cleanup tests
Fix MongoID generator